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Thread: Lux to PPFD to DLI

  1. #1

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    Default Lux to PPFD to DLI

    I'm trying to dial in my lights a bit better. Have used a couple online calculators and just need an LED guru to check its in the right ballpark and I'm following the right process please

    HLG Quantum Board QB288v2 3000k 260w X 2 running at 125w each for 250w total

    At the canopy they are reading 17klux with my Urceri MT-912

    This translates to a ppfd of about 248 umol/s/m2 according to the HLG calculator for my lights spectrum

    Running a 24/0 schedule gives a DLI of 21.34 according to the waveform lighting DLI calculator


    Anything I've missed or is that basically it?

    Cheers in advance

    Mac

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    Looks ok to me at 68ish lumens per ppf

    Then take the ppfd and x 3600 x 24 and divide by a million to get moles per day aka DLI

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    Yep - I think you said 64ish per ppf when I was trying to calc it, Gardro - that's what I work to anyway.
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    Quote Originally Posted by gardro View Post
    Looks ok to me at 68ish lumens per ppf

    Then take the ppfd and x 3600 x 24 and divide by a million to get moles per day aka DLI
    Cheers fella. appreciate you poppin in, puts my mind at rest.

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    Quote Originally Posted by Herbitual View Post
    Yep - I think you said 64ish per ppf when I was trying to calc it, Gardro - that's what I work to anyway.
    Correct Herbs for you boards

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    Quote Originally Posted by Herbitual View Post
    Yep - I think you said 64ish per ppf when I was trying to calc it, Gardro - that's what I work to anyway.
    Cheers herb,

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    Found a neat little chart

    Last edited by Mac; 12-02-21 at 02:10 PM.

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    Quote Originally Posted by Mac View Post
    Found a neat little chart

    Thats where I looked it up. Let the pros do the measurements so we dont need to buy expensive par meters.

    And check out Diablo much more par and less human lumens !

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    That looks to be correct!
    We have a blog post about DLI as well, where you can find a pretty awesome DLI-chart that gives a clear overview. Might be useful in the future. We think it's a lot handier than a calculator and downloading the chart to your phone makes it available even in a basement with no internet or Wi-Fi signal

    HLG has done a stellar job with that conversion table! Quantum sensors are indeed too expensive for the average hobbyist.

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    Quote Originally Posted by Max - LEDTonic View Post
    That looks to be correct!
    We have a blog post about DLI as well, where you can find a pretty awesome DLI-chart that gives a clear overview. Might be useful in the future. We think it's a lot handier than a calculator and downloading the chart to your phone makes it available even in a basement with no internet or Wi-Fi signal

    HLG has done a stellar job with that conversion table! Quantum sensors are indeed too expensive for the average hobbyist.
    appreciate the link thank you, have downloaded the chart and bookmarked the page

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